STOCKHOLM — Facebook plans to build a new data center at its server farm in northern Sweden, less than a year after opening the plant, its first outside the United States.

The company said Friday that the center in the northern city of Lulea will use new technology that will double the speed of construction, including pre-made modular sections that are assembled on-site.

In June 2013, Facebook inaugurated the Lulea plant in a move to improve the social network’s performance in Europe. It partly chose the location of the northern city because of the cold climate, which is crucial for maintaining the servers’ temperature.

The Menlo Park-based social network did not say when construction will begin.